That's fantastic, I would love to own something like that even though it's virtually useles as no terrestrial signals being broadcast for that system anymore (probably 405 lines standard). No 'picture valve' used there (CRT) just a mirror.
Would love to see a circuit diagram for that thing.
The Brits have done well with TV technology. The Americans had colour TV before us but we waited, were a little more patient and scientists and technicians working in Hanover, Germany, developed the PAL system (Phase Alternate Line) which was (and still is) far superior to the American transmission mode.